Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 367 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a string (c) a battery cell (d) a heavy nut or washer
2. 2.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it halves (b) it doubles (c) it stays the same (d) it becomes 4 times
3. 3.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a balloon (d) a string
4. 4.🕰️ Why do we time 10 swings and divide, instead of timing just one? (a) it is more accurate (b) one swing is too slow (c) 10 is a lucky number (d) it is more fun
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is what we measure. (a) False (b) True
6. 6.True or false: a string is not needed for the pendulum. (a) True (b) False
7. 7.🧺 Which of these is not needed for the pendulum? (a) a pencil and tape (b) a heavy nut or washer (c) a mirror (d) a stopwatch
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a magnet (c) a heavy nut or washer (d) a ruler
10. 10.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
11. 11.🔮 Predict: you make the string shorter. The swings get ___. (a) stopped (b) slower (c) heavier (d) quicker
12. 12.🕰️ Which old clock uses a pendulum to keep time? (a) a sundial (b) a grandfather clock (c) a digital watch (d) a phone
13. 13.True or false: a stopwatch is not needed for the pendulum. (a) True (b) False
14. 14.📘 What pulls the pendulum bob back down after each swing? (a) the string (b) the wind (c) gravity (d) magnetism
15. 15.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) about the same (c) much slower (d) it cannot swing
16. 16.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a ruler (c) a balloon (d) a pencil and tape
17. 17.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the pendulum? (a) a magnet (b) a ruler (c) a heavy nut or washer (d) a pencil and tape
19. 19.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much slower (c) no, hardly at all (d) yes, much faster
20. 20.🛟 Why should you stand back from a swinging pendulum? (a) it is magnetic (b) it is wet (c) it is hot (d) the bob could hit you
21. 21.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a heavy nut or washer (c) a magnet (d) yeast
22. 22.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
23. 23.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
24. 24.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a string (d) a battery cell
26. 26.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a mirror (b) a pencil and tape (c) a ruler (d) a stopwatch
27. 27.True or false: a ruler is not needed for the pendulum. (a) True (b) False
28. 28.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a heavy nut or washer (c) a stopwatch (d) a pencil and tape
29. 29.🕰️ A pendulum makes 5 swings in 15 seconds. How many seconds does one swing take?
30. 30.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
31. 31.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a magnet (c) yeast (d) a stopwatch
32. 32.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
34. 34.🧺 Which of these is needed for the pendulum? (a) a ruler (b) a mirror (c) a magnet (d) a balloon
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is the one thing we change. (a) True (b) False
36. 36.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 12 seconds?
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the string length (c) how far we pull it back (d) the weight of the bob
38. 38.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 5 seconds?
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
40. 40.True or false: a magnet is not needed for the pendulum. (a) False (b) True

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